PHP：需要一个有价格的文件

Question

I am implementing a small online purchase page with a very few products.

<?php  
$item_name = "lamp";
$item_price = 29.99;
$item_category = "furniture";
$item_Dollar = 29;
$item_Cents = 99;
?>

How do I go about it? It's only 2 product types and basically only prices would differ so there is no need for a database. I was thinking of including a .php file containing all the prices and having a function there that will switch($id) between them and reassign the values.

<?php
    function selectProduct($id) {

     switch($id) {
          case 1:
              $item_name = "lamp";
              $item_price = 19.99;
              $item_category = "furniture";
              $item_Dollar = 19;
              $item_Cents = 99;
              break;

          case 2:
              // and so on...

          default: break;
     }
    }
?>

The logic enters the respective cases but it does not reassign the instance variables. For some reason when I try to access them on another page after require_once(pricings.php); they are empty. I am not very familiar with PHP which probably made itself obvious from the code. What am I doing wrong?

Answer 1

I would build an array of items, where each element is a key/value pair, the key being the item id and the value being another array of key/value pairs for the item's attributes:

$items = array(
    1 => array(
        'name' => 'lamp',
        'price' => '19.99',
        'category' => 'furniture',
    ),
    2 => array(
        'name' => 'chair',
        'price' => '29.99',
        'category' => 'furniture',
    ),
);

Then you can simply refer to the array by using its product id as the index:

$id = 1;
echo "Name is: " . $items[$id]['name'];
echo "Price is: " . $items[$id]['price'];